<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>动画入门一</title>

  <link rel="stylesheet" href="css/h3.css">

</head>

<body>

  <!-- 最基本的动画 -->
  <span class="ani1">动画一</span>

  <!-- 完整的动画 -->
  <div class="ani2">
    动画二
  </div>

  <div class="yj">
    圆角
  </div>

</body>

</html>